Rivers of oil in Arkansas town

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Oil pipeline bursts in suburb

McDaniel said Tuesday he asked Exxon Mobil, the owner of the 60-year-old pipeline, to preserve all documents and information related to the spill and cleanup efforts.

"This incident has damaged private property and Arkansas's natural resources. Homeowners have been forced from their homes as a result of this spill," McDaniel said in a statement Tuesday. "Requesting that Exxon secure these documents and data is the first step in determining what happened and preserving evidence for any future litigation."

The Pegasus pipeline carries Canadian crude from Illinois to Texas, a state transportation engineer said.

Exxon Mobil met with displaced residents over the weekend to explain how they can make claims for losses. "If you have been harmed by this spill then we're going to look at how to make that right," Exxon Mobil Pipeline Co. President Gary Pruessing told them.